code: def setup(app):
      app.add_css_file("custom.css")
      app.add_js_file("copybutton.js")
  
file_path: networkx/doc/conf.py
imports: import os
  from datetime import date
  from sphinx_gallery.sorting import ExplicitOrder, FileNameSortKey
  from warnings import filterwarnings
  import networkx
  from numpydoc.docscrape import NumpyDocString
  from numpydoc.docscrape_sphinx import SphinxDocString
label_desc: Use image node_id 1 for calling a global function with example usage: setup(app) without return types